Gwyneth Paltrow is shooting down reports that she is cheating on her husband, Coldplay lead singer Chris Martin, with entertainment lawyer Kevin Yorn. A rep for Yorn echoed Paltrow's denial, saying speculation that the two had an affair "is categorically untrue." The rumor mill went into overdrive after Whisper, a new secret-sharing app, claimed to have information about the Oscar winner's alleged affair.